TW469415B - Image-based method for providing lighting effect in three-dimensional scenario image - Google Patents

Image-based method for providing lighting effect in three-dimensional scenario image Download PDF

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TW469415B
TW469415B TW089115594A TW89115594A TW469415B TW 469415 B TW469415 B TW 469415B TW 089115594 A TW089115594 A TW 089115594A TW 89115594 A TW89115594 A TW 89115594A TW 469415 B TW469415 B TW 469415B
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Taiwan
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image
light source
mode
dimensional
light sources
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TW089115594A
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Chinese (zh)
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Shu-Fang Hsu
Kuang-Rong Lu
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Ulead Systems Inc
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Priority to US09/858,695 priority patent/US6577444B2/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T15/00—3D [Three Dimensional] image rendering
    • G06T15/50—Lighting effects
    • G06T15/506—Illumination models
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/50—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T15/00—3D [Three Dimensional] image rendering
    • G06T15/10—Geometric effects
    • G06T15/20—Perspective computation
    • G06T15/205—Image-based rendering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Graphics (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computing Systems (AREA)
  • Geometry (AREA)
  • Processing Or Creating Images (AREA)
  • Image Generation (AREA)

Abstract

There is an image-based method for providing lighting effect in three-dimensional scenario image, wherein various lighting effects can be provided for three-dimensional objects, and its simulated light source can be located at any position. The method comprises dividing the light sources distributed in front and back of the three-dimensional object into two groups by using image approach; next, sequentially combining each lighting effect starting from the light source in the back; then, combining the lighting effect obtained finally with the three-dimensional object; next, sequentially combining the light sources in front of the object, and processing the obtained lighting effect by special function, thereby generating a special effect; and combining this light source and the three-dimensional object by a specific combination mode.

Description

469415 五 '發明說明（1) 本發明係有 方法’特別係有 提供打光效果的 在二維影像 作’到近來的虛 甚。為了使三維 中’有時必須加 維物體影像的軟 製好三維物體後 度等’然後計算 度分佈’藉以顯 供打光效果的方 以得到的影像會 者，此種習知的 方的狀況，若虛 結果將會只是看 有鏗於此， 礎在三維場景影 維物體各種不同 等。 本發明之另 場景影像中提供 位置。 為了達到上 維物體 網頁製 像更加 政果。 成打光 的空間 源的光 光效果 是提供 ，無法 要是適 於三維 體的剪 目的乃 打光效 果，例 關於一種 關於一種 方法。 中繪製三 擬影像、 物體的影 上打光的 體，其形 ，在虛擬 出虛擬光 示出具打 式由於僅 比較單調 方式，主 擬光源位 到三維物 本發明之 像中提供 的打光效 ，從工業 作等，其 地生動， 不過，目 效果的作 中，設定 線打到三 的三維物 虛擬光源 提供不同 用於光源 物體的後 影，看不 在於提供 果的方法 如光暈、 動畫製 需求曰 的過程 來繪製三 般是在繪 位置、強 時的光強 。此種提 運算，所 效果。再 維物體前 所得到的 的效果。 影像為基 以提供三 、散射 一目的在於提供一種以影像為基礎在三維 打光效果的方法，其模擬光源可位於任意 述目的，本發明主要是利用影像的方式， 提供影像中三維物體光影效果的 以影像為基礎在三維場景影像中 設計、 應用輿· 在繪製 前可用 法，一 光源的 維物體 體影像 並加以 的光影 位於三 方，則 出打光 一種以 ，其可 光反射469415 Five 'Explanation of the invention (1) The present invention has a method', and particularly has a lighting effect in a two-dimensional image. In order to make it possible to get the image meeting in 3D, "sometimes it is necessary to soften the 3D object image after softening the 3D object, etc." and then calculate the degree distribution. If the virtual result will only look at this, based on a variety of different 3D scene shadow objects. The position is provided in another scene image of the present invention. In order to achieve high-dimensional objects, the webpage image is more political. The light effect of the space source that is lighted is provided, and it cannot be the light effect if it is suitable for the trimming of three-dimensional objects, for example, about a method. In the drawing of three pseudo-images, the lighted body on the shadow of the object, its shape is shown in the virtual virtual light. As the only monotonic method, the main pseudo-light source is positioned to the three-dimensional object. The lighting effect provided in the image of the invention From industrial works, etc., the place is vivid, but in the effect of the effect, set the line to three three-dimensional objects virtual light source to provide different after-images for the light source object, not in the way to provide results such as halo, animation The process of drawing the three requirements is to draw the light intensity when the drawing position is strong. This kind of calculation has the effect. The effect obtained before redimensionalizing the object. The purpose of the image is to provide three, scattering. The purpose is to provide a method for lighting effects in three dimensions based on the image. The simulated light source can be located at any of the stated purposes. The present invention mainly uses the image to provide light and shadow effects of three-dimensional objects in the image. The design and application of three-dimensional scene images based on the image. Can be used before drawing. A three-dimensional image of a light source object and the light and shadow are located in the three directions. Then, a kind of light can be used, which can reflect light.

46 94 彳 5 五、發明說明（2) 將分佈在三維物# + + & 方的光源開始：ΐ方的光源分成兩群，然後從後 到的光源效果盘=唯物j源的：果合併’然後將最後得 運算，以得光果利用特殊的函數加以 特定的合併模式加以合冑。 L、一維物體，以 為了更進一步闡明本發明之方法、架構 口附，說明本發明之實施例如下，其中：、 ' 第1圖係用以說明本發明之以影像為 影像中提供打光效果的方法的示意圖。竭在-維场景 =2圖係繪示本發明之以影像為基礎在三維場景影像 中提供打光效果的方法之流程圖。 第3a圖至第3c圖係用以說明本發明之一實施例的圖 片。 實施例之說明 本發明之以影像為基礎在三維場景影像中提供打光效 果的方法’如第1圖所示’主要是將影像中在3維物體1〇後 方的光源20a〜20e與前方的光源30a〜30e分成兩群，然後先 從後方光源開始依序將每一光源的影像合併，再將所有後 方光源影像合併的結果與三維物體的影像合併。接著將前 方各光源依序合併，再將刖方光源影像合併的結果經特殊 函數運算，以賦予其不同的效果。最後，再將具特殊效果 的前方光源影像與前述後方光源與三維物體合併的影像進 行合併，即可得到在三維場景中打光的效果。46 94 彳 5 V. Description of the invention (2) Start the light source distributed in the three-dimensional object # + + & square light source: the square light source is divided into two groups, and then the light source effect plate from the back = materialistic j source: fruit merger 'Then, the final operation is used to obtain the light fruit using a special function and a specific merge mode to combine them. L, one-dimensional object, in order to further clarify the method and architecture of the present invention, the following examples of the present invention are described, in which: '' Figure 1 is used to illustrate the present invention to provide lighting in the image as an image Schematic of the effect method. Exhausted-dimensional scene = 2 is a flowchart showing a method for providing lighting effects in a three-dimensional scene image based on the image of the present invention. Figures 3a to 3c are pictures for explaining one embodiment of the present invention. Description of the embodiment The method of the present invention for providing a lighting effect in a three-dimensional scene image based on an image 'as shown in Fig. 1' is mainly to combine the light sources 20a-20e behind the three-dimensional object 10 in the image with the front The light sources 30a to 30e are divided into two groups, and then the images of each light source are sequentially combined starting from the rear light sources, and then the result of merging the images of all the rear light sources is merged with the image of the three-dimensional object. Then the front light sources are sequentially combined, and the result of combining the square light source images is calculated by special functions to give them different effects. Finally, the image of the front light source with special effects is combined with the image of the aforementioned rear light source and the 3D object to obtain the lighting effect in the 3D scene.

含青 中 併 驟：（γ 閱第2圖，本發明之方法的流程係包括下列步 體的後方驟1〇〇、將光源分成兩群，第一群係位於三維物 102，對筮第二群係位於三維物體的前方；（ii)步驟 驟1 〇4，第一群光源排定其形成二維影像的順序；（i i i)步 (ίν)步驟Iff 一群光源中之每一光源，形成其二維影像； 一維影俊你6，&選取—合併模式（merge mode)，將光源的 ;Cv)务、先劓的打光結果合併，並儲存於第一緩衝器 ，若/驟，第一群光源中之各光源是否均已完成合 驟11〇 Λ則進行下一步驟，否則進行至步驟104 ;(vi)步 維物體將上述第一緩衝器中之光源影像之合併結果與三 器中：（影像調和（bl ending)，並將結果儲存於第二緩衝 的噸序；V|1)步驟11 2，對第二群光源排定其形成二維影像 形成其~ Vl^)步驟114 ’對第二群光源中之每一光源， 上逑光維影像；（丨x)步驟11 6，使用某些特殊函數，對 中·，（xt的二維影像提供特殊效果，並儲存於第三緩衝器 史光溽的&118，選取一合併模式，將上述第三緩衝器中 1 2〇，第'—二維影像與第二缓衝器中的結果合併；（xi)步驟 結束，〜群光源中之各光源是否均已完成合併，若是則 在則進行至步驟11 4。 的影像與塊流程的多個步驟中均有提到合併’可以將光源 讀的影^ 2源的影像合併’也可以將光源的影像與三維物 使用不同^併。至於合併的方式’可以依所需的效果選擇 相力17模式（add mode)、打光模式（lightingContaining the middle and middle steps: (γ See Figure 2. The process of the method of the present invention includes the following steps: Step 100. Dividing the light source into two groups, the first group is located on the three-dimensional object 102, and the second is opposite. The cluster is in front of the three-dimensional object; (ii) step 104, the first group of light sources arranges the order in which it forms a two-dimensional image; (iii) step (ίν) step Iff each light source in a group of light sources forms its Two-dimensional video; One-dimensional shadows, and you 6, select-merge mode (merging light source; Cv) task, first lighting results are merged and stored in the first buffer, if / step, If all the light sources in the first group of light sources have completed step 110, proceed to the next step, otherwise proceed to step 104; (vi) the step-dimensional object combines the result of combining the light source images in the first buffer with three In the device: (bl ending), and store the result in the ton order of the second buffer; V | 1) Step 11 2. Schedule the second group of light sources to form a two-dimensional image to form its ~ Vl ^) step 114 'For each light source in the second group of light sources, upload a light-dimensional image; (丨 x) step 116, use These special functions provide special effects on the two-dimensional images of the center, xt, and are stored in the third buffer Shi Guangxun's & 118. A merge mode is selected, and the third buffer is stored in the second buffer. '—The two-dimensional image is merged with the result in the second buffer; (xi) Step ends, whether each of the light sources in the group of light sources has been merged, and if so, proceed to step 11 4. The image and block flow It is mentioned in multiple steps that you can merge the image of the light source ^ 2 images of the source can be merged or the image of the light source and the three-dimensional object can be used differently. As for the method of merging, you can choose according to the desired effect Xiangli 17 mode (add mode), lighting mode (lighting

m〇de)、1的合併模式’舉例而言’有調和模式（blending 相k … . 469415 五、發明說明（4) --------- mode)相乘模式（mu 11 i p 1 e m〇de)、反相乘模式（. of rauit|Ple mode)、色相模s(hue 的化）等 各巧合：模式’兹略述如下’不過這只是用以說明本二 之若干實施例，而並非用以限定本發明之範圍。 首先’定義參數如下： F :前景的影像 B :背景的影像 Result :合併的結果 每一個影像均具有三個平面，分別是紅平面（R)、綠 平面（G)及藍平面（B) ’其中，osr、g、Bg255。 0 ^Mask Η，色相（hue) ;S :飽和度（saturation) ;Br :亮度 (brightness) 對於調和模式m〇de), 1's merge mode 'for example' has a blending mode (blending phase k .... 469415 V. Description of the invention (4) --------- mode) Multiplying mode (mu 11 ip 1 em〇de), inverse multiplication mode (. of rauit | Ple mode), hue mode s (hue), and other coincidences: the mode 'Here is briefly described below', but this is only used to explain some of the two embodiments It is not intended to limit the scope of the invention. First, the definition parameters are as follows: F: foreground image B: background image Result: merged result Each image has three planes, which are the red plane (R), the green plane (G), and the blue plane (B). Among them, osr, g, Bg255. 0 ^ Mask Η, hue; S: saturation; Br: brightness For blending mode

Resul t(R) -F(R) xMask+B(R) X (1. 0 - Mask) Result(G)=F(G)XMask+B(G)x(1.0 - Mask)Resul t (R) -F (R) xMask + B (R) X (1. 0-Mask) Result (G) = F (G) XMask + B (G) x (1.0-Mask)

Resu 11(B) =F(B) xMask +B(B ) x(1. 0 - Mask) 對於相加模式Resu 11 (B) = F (B) xMask + B (B) x (1. 0-Mask) for additive mode

Result(R) =F(R) +B(R)Result (R) = F (R) + B (R)

Result(G) =F(G) +B(G)Result (G) = F (G) + B (G)

Result(B) =F(B) +B(B) 對於打光模式 若 F(R)^128 ，則Result(i?)=B(R)+127x F(R)/255 ；Result (B) = F (B) + B (B) For lighting mode If F (R) ^ 128, then Result (i?) = B (R) + 127x F (R) / 255;

d6 94 1 5 五、發明說明（5) 否則Result(R)=B(R) - 127xF(R)/255 若 F(G)2128 ，則Result(G)=B(G)+127x F(G)/255 ； 否則Result(G)=B(G) - 127xF(G)/255 若 F(B)2128 ，則Result(B)=B(B)+127x F(B)/255 ； 否則Result(B)=B(B) - 127xF(B)/255 對於相乘模式d6 94 1 5 V. Description of the invention (5) Otherwise Result (R) = B (R)-127xF (R) / 255 If F (G) 2128, then Result (G) = B (G) + 127x F (G ) / 255; Otherwise Result (G) = B (G)-127xF (G) / 255 If F (B) 2128, then Result (B) = B (B) + 127x F (B) / 255; otherwise Result ( B) = B (B)-127xF (B) / 255 for multiplication mode

Resul t(R) -F(R) xB(R)/255 Result(G) =F(G) xB(G)/255 Resul t(B) -F(B) XB(B)/255 對於反相乘模式Resul t (R) -F (R) xB (R) / 255 Result (G) = F (G) xB (G) / 255 Resul t (B) -F (B) XB (B) / 255 for inversion Multiplication mode

Resul t(R) = 255 - ( 255 - F(R))X(255 -B(R))/255Resul t (R) = 255-(255-F (R)) X (255 -B (R)) / 255

Result(G) =255 - (255 - F(G))X(255 -B(G))/255Result (G) = 255-(255-F (G)) X (255 -B (G)) / 255

Result(B) =255 - (255 - F(B))X(255 -B(B))/255 對於色相模式Result (B) = 255-(255-F (B)) X (255 -B (B)) / 255 for hue mode

Result(H) =F(H)Result (H) = F (H)

Result(S) =B(S)Result (S) = B (S)

Resul t(B) = β(β) B : brightness 利用上述各種不同的合併模式，可以得到不同的合併 效果’請參閱第3a圖至第3c圖。其中，第3a圖係使用相加Resul t (B) = β (β) B: brightness By using the various different merge modes described above, different merge effects can be obtained. 'Please refer to Figures 3a to 3c. Among them, Figure 3a uses addition

第8頁 4 6 94 1 5 五 發明說明（6) 第“圖係將三二J: Ϊ ::;像合併之後所得到的效果。 算，之後與三維Π;::::影像…特殊函數的運 將第3a圖之三維物體後方：：：得到的效果。第3c圖則為 的影像與三維物體影像：後$像及第3b圖之前方光源 圖的圖“，可看丄：；：：=:=圖心: 維物體的前方或後方各種位沾了可以侍到二 上述特殊函數打光效果。 function)或蜂立茶奴，M . v bauss i an 光源的影像產:光函 些在三維物體影= = =狀的效果等。上述這 術的方法無法提供的。在本：匕效果1是利用先前技 礎’將三維物體前方光源與後方光调=J以影像為基 利用本發明之=供;殊的：光效果，所以 變而且生動真實的打光效果易地^供三維物體影像豐富多 本發Ϊ發實施例揭露如上，然其並非用以限定 r ^ ^…：^項技藝者，在不脫離本發明之精神和 德的更動與潤，，因此本發明之保L 圍虽視後附之申清專利範圍所界定者為準。Page 8 4 6 94 1 5 Five descriptions of the invention (6) The "picture is the effect obtained by merging three or two J: Ϊ ::; images. Calculate, and then three-dimensional Π; :::: image ... special function The rear of the three-dimensional object in Figure 3a ::: The effect obtained. The image in Figure 3c and the image of the three-dimensional object: the rear $ image and the square light source image in front of Figure 3b ", see 丄:;: : =: = Picture center: If the front or back of the dimensional object is stained with various positions, it can serve the lighting effect of the above two special functions. function) or the bee standing tea slave, M. v bauss i an image source of the light source: the light function. The above method cannot provide. In this book: Dagger effect 1 is to use the previous technology foundation to adjust the front light source and the back light of a three-dimensional object = J based on the image and use the present invention. = Special: light effect, so it is easy to change and vivid real lighting effect The embodiment of the present invention is disclosed as above, but it is not intended to limit r ^^ ...: ^ Artists, without departing from the spirit and virtue of the present invention, The security of the invention shall be subject to the scope of the patent claims attached to it.

Claims (1)

469415 六、申請專利範圍 1 · 一種以影像為基礎在三維場景影像中提钱打光效果 的方法，包括下列步驟： (i)將光源分成兩群，第一群係位於三維物體的後 方，第二群係位於三維物體的前方； (i i)對第一群光源排定其形成二維影像的順序； (i i i)對第一群光源中之每一光源，形成其二維影 像 光 (i v)選取一合併模式，將光源的二維影像與先前的打 結果合併，並將合併的結果儲存於第一緩衝器中； (v)第一群光源中之各光源是否均已完成合併，若是 則進行下一步驟，否則進行至步驟（i i i); (v i)將上述第一緩衝器中之光源影像的合併結果與三 維物體之影像調和，並將結果儲存於第二缓衝器中； (v i i)對第二群光源排定其形成二維影像的順序； (v i i i)對第二群光源中之每一光源，形成其二維影 像； (i X)使用一特殊函數，對上述光源的二維影像提供特 殊效果，並儲存於第三緩衝器中； (X )選取一合併模式，將第三缓衝器中之光源的二維 影像與第二缓衝器中的結果合併； (xi)第二群光源中之各光源是否均已完成合併，若是 則結束，否則進行至步雜（v i i i)。469415 VI. Scope of patent application1. A method for raising money and lighting effects in a three-dimensional scene image based on an image, including the following steps: (i) divide the light source into two groups, the first group is located behind the three-dimensional object, The two groups are located in front of the three-dimensional object; (ii) the first group of light sources is arranged in the order that they form a two-dimensional image; (iii) each of the first group of light sources is formed into a two-dimensional image light (iv) Select a merge mode to merge the two-dimensional image of the light source with the previous printing result, and store the combined result in the first buffer; (v) whether each light source in the first group of light sources has been merged, if so, Proceed to the next step, otherwise proceed to step (iii); (vi) Blend the combined result of the light source image in the first buffer with the image of the three-dimensional object, and store the result in the second buffer; (vii ) Arrange the order of the second group of light sources to form a two-dimensional image; (viii) form a two-dimensional image of each of the light sources in the second group; Dimensional image For special effects and stored in the third buffer; (X) select a merge mode to merge the two-dimensional image of the light source in the third buffer with the result in the second buffer; Whether all the light sources in the group light source have been merged, if yes, the process ends, otherwise proceed to step (viii). 第10頁 2.如申請專利範圍第1項所述之方法，其中，上述合 模式可為調和模式、相加模式、打光模式、相乘模式' 469415 六、申請專利範圍 反相乘模式或色相模式等。 3 ·如申請專利範圍第1項所述之方法，其Φ，上述步 驟（i v )中對不同的光源可使用不同的合併模式。 4. 如申請專利範圍第1項所述之方法，其中，上述步 驟（ix)中的特殊函數可為高斯函數或噪音函數等。 5. 如申請專利範圍第1項所述之方法，其中，上述步 驟（X )中對不同的光源可使用不同的合併模式。Page 10 2. The method according to item 1 of the scope of patent application, wherein the above combination mode can be a harmonic mode, an addition mode, a lighting mode, a multiplication mode '469415 6. A patent application scope inverse multiplication mode or Hue mode, etc. 3. The method according to item 1 of the scope of patent application, wherein Φ, in the above step (i v), different combining modes can be used for different light sources. 4. The method according to item 1 of the scope of patent application, wherein the special function in step (ix) above may be a Gaussian function or a noise function. 5. The method according to item 1 of the scope of patent application, wherein in the above step (X), different merging modes can be used for different light sources.
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